/* ===== 响应式设计 ===== */

/* 全局响应式基础 */
img { max-width: 100%; height: auto; }
a, button, .btn, .nav-item a, .filter-tab { touch-action: manipulation; }
input, textarea, select, button { font-size: 16px; } /* 防iOS缩放 */

/* 平板设备 */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .product-detail-layout {
        grid-template-columns: 1fr;
    }

    .product-main {
        grid-template-columns: 1fr;
    }

    .product-detail-sidebar {
        order: -1;
    }

    .product-nav-list {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }

    .product-nav-item {
        margin-bottom: 0;
    }

    .product-nav-item img {
        width: 40px;
        height: 40px;
    }

    .product-nav-item a {
        padding: 6px 10px;
    }
    
    .news-item {
        grid-template-columns: 1fr;
    }
    
    .news-image {
        height: 200px;
    }
    
    .contact-grid,
    .about-contact-section .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid,
    .products-grid,
    .support-grid,
    .culture-grid,
    .team-grid,
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    .products-preview-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .products-wrapper,
    .news-wrapper,
    .projects-wrapper {
        grid-template-columns: 1fr;
    }

    .product-item-h,
    .news-item-h,
    .project-item-h {
        flex-direction: column;
    }

    .product-item-image,
    .news-item-image,
    .project-item-image {
        flex: 0 0 200px;
    }

    .project-detail-header {
        flex-direction: column;
    }

    .project-detail-image {
        flex: 0 0 auto;
    }
}

/* 手机设备 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .logo {
        margin-bottom: 15px;
    }
    
    .mobile-menu-toggle {
        display: flex;
        position: absolute;
        right: 20px;
        top: 25px;
    }
    
    .main-nav {
        width: 100%;
        display: none;
    }
    
    .main-nav.active {
        display: block;
    }
    
    .main-nav ul {
        flex-direction: column;
        width: 100%;
    }
    
    .nav-item {
        margin: 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-item a {
        display: block;
        padding: 15px;
        border-radius: 0;
    }
    
    .page-header {
        padding: 40px 0;
    }
    
    .page-header h1 {
        font-size: 2em;
    }
    
    .page-header p {
        font-size: 1em;
    }
    
    .hero-section {
        padding: 60px 0;
    }
    
    .hero-content h1 {
        font-size: 2em;
    }
    
    .hero-content p {
        font-size: 1em;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 10px;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .features-section {
        padding: 60px 0;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .products-preview-section,
    .products-section {
        padding: 60px 0;
    }
    
    .products-preview-grid,
    .products-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .news-preview-section,
    .news-section {
        padding: 60px 0;
    }
    
    .news-preview-list {
        gap: 15px;
    }
    
    .news-card {
        flex-direction: column;
        text-align: center;
    }
    
    .news-date {
        width: 60px;
        height: 60px;
        margin: 0 auto;
    }
    
    .news-date .day {
        font-size: 1.5em;
    }
    
    .support-section,
    .faq-section,
    .support-process-section {
        padding: 60px 0;
    }
    
    .support-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .process-steps {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .about-intro-section,
    .about-culture-section,
    .about-history-section,
    .about-team-section,
    .about-stats-section {
        padding: 60px 0;
    }
    
    .culture-grid,
    .team-grid,
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .timeline-item {
        flex-direction: column;
        text-align: center;
    }
    
    .timeline-year {
        margin: 0 auto;
    }
    
    .contact-section,
    .about-contact-section,
    .map-section {
        padding: 60px 0;
    }
    
    .contact-grid,
    .about-contact-section .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .map-container {
        height: 300px;
    }
    
    .site-footer {
        padding: 40px 0 20px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .cta-section {
        padding: 40px 0;
    }
    
    .cta-section h2 {
        font-size: 1.8em;
    }
    
    .section-title {
        font-size: 1.5em;
        margin-bottom: 30px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .btn-large {
        padding: 14px 28px;
        font-size: 16px;
    }
    
    .contact-form {
        padding: 20px;
    }
    
    .form-group input,
    .form-group textarea {
        padding: 10px;
    }

    .product-detail-layout {
        grid-template-columns: 1fr;
    }

    .product-main {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .gallery-main img {
        height: 260px;
    }

    .product-detail-section .product-info {
        max-height: 260px;
    }

    .product-title {
        font-size: 1.5em;
    }

    .product-detail-sidebar {
        order: -1;
    }

    .product-nav-list {
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
    }

    .product-nav-item img {
        width: 36px;
        height: 36px;
    }

    .product-nav-item a {
        padding: 5px 8px;
        font-size: 0.85em;
    }

    .product-nav-name {
        font-size: 0.85em;
    }

    .products-wrapper,
    .news-wrapper,
    .projects-wrapper {
        grid-template-columns: 1fr;
    }

    .product-item-h,
    .news-item-h,
    .project-item-h {
        flex-direction: column;
    }

    .product-item-image,
    .news-item-image,
    .project-item-image {
        flex: 0 0 180px;
    }

    .product-item-image img,
    .news-item-image img,
    .project-item-image img {
        height: 180px;
        object-fit: contain;
        min-height: auto;
    }

    .product-item-body,
    .news-item-body,
    .project-item-body {
        padding: 18px;
    }

    .product-item-title,
    .news-item-title,
    .project-item-title {
        font-size: 1.1em;
    }

    .filter-tabs {
        gap: 6px;
    }

    .filter-tab {
        padding: 7px 14px;
        font-size: 0.85em;
    }

    .project-detail-header {
        flex-direction: column;
    }

    .project-detail-image {
        flex: 0 0 auto;
    }

    .project-detail-image img {
        height: 200px;
    }

    .project-detail-body {
        padding: 20px;
    }

    .sidebar-section {
        padding: 15px;
    }

    .category-list {
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
    }

    .category-item {
        display: inline-flex;
        padding: 5px 12px;
        border-radius: 20px;
        background: var(--light-bg);
    }

    .category-count {
        display: none;
    }

    .hot-product-list,
    .hot-news-list {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }

    .hot-product-item,
    .hot-news-item {
        margin-bottom: 0;
    }
}

/* 小屏手机 */
@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }
    
    .page-header h1 {
        font-size: 1.5em;
    }
    
    .hero-content h1 {
        font-size: 1.5em;
    }
    
    .section-title {
        font-size: 1.3em;
    }
    
    .feature-card,
    .support-card,
    .culture-card,
    .stat-card {
        padding: 20px;
    }
    
    .news-item {
        padding: 20px;
    }
    
    .news-detail {
        padding: 20px;
    }
    
    .product-info {
        padding: 15px;
    }
    
    .team-info {
        padding: 15px;
    }
    
    .contact-card {
        padding: 20px 15px;
    }
    
    .timeline-item {
        padding: 15px;
    }
    
    .faq-item {
        padding: 15px;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 13px;
    }

    .product-item-image,
    .news-item-image,
    .project-item-image {
        flex: 0 0 150px;
    }

    .product-item-image img,
    .news-item-image img,
    .project-item-image img {
        height: 150px;
        object-fit: contain;
        min-height: auto;
    }

    .product-item-body,
    .news-item-body,
    .project-item-body {
        padding: 14px;
    }

    .product-item-header,
    .news-item-header,
    .project-item-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .product-item-date,
    .news-item-date,
    .project-item-date {
        margin-top: 4px;
    }
}

/* 横屏手机 */
@media (max-width: 768px) and (orientation: landscape) {
    .hero-section {
        padding: 40px 0;
    }
    
    .features-section,
    .products-preview-section,
    .products-section,
    .news-preview-section,
    .news-section,
    .support-section,
    .faq-section,
    .support-process-section,
    .about-intro-section,
    .about-culture-section,
    .about-history-section,
    .about-team-section,
    .about-stats-section,
    .about-contact-section,
    .contact-section,
    .map-section {
        padding: 40px 0;
    }
}

/* 打印样式 */
@media print {
    .site-header,
    .site-footer,
    .mobile-menu-toggle,
    .btn,
    .contact-card,
    .map-section {
        display: none;
    }
    
    .site-main {
        min-height: auto;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    .page-header {
        background: none;
        color: black;
        padding: 20px 0;
    }
    
    a {
        color: black;
        text-decoration: none;
    }
    
    .section-title:after {
        display: none;
    }
}